Fall-block hook



(No Model.)

L. T. DIGKSON.

FALL BLOCK HOOK.

No. 271,226. Patented Jan.30,1883.

lNVENTOR:

UNrTED STATES PATENT OFFICE.

I L. TAYLOR DIGKSON, OF PHILADELPHIA,PENNSYLVANIA.

FALL-BLOCK HOOK.

SPECIFICATION forming part of Letters Patent'No. 271,226, dated January 30, 1883.

Application filed J une 16, 1882. (No model.)

To all whom it may concern Be it known that I, L. TAYLOR DIoKsoN, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented a new and useful Improvement in Fall-Block Hooks, of which improvement the following is a specification.

My invention relates chiefly to davit fallblocks; but it applies to other fall-blocks.

The principal objects in View in my invention are to make the hook simple and substantial, and so that it shall be at once self-releasing, or, if required, self-locking, when the boat or other object suspended from it comes to rest on the water or other intended place of deposit. To attain these objects and at the same time adapt the hook to general uses, I employ a pivoted double hook, one end of which is made to overba-lance the other end, as shown in the accompanying drawings, in which-- Figure 1 is a side elevation of an ordinary fall-block and link, and a swiveling stock in or to which the hook is pivoted, showing the hook in engagement with the eyebolt -ring, usually found near either end of a ships boat, (the boat being partly shown,) also, in dotted lines, showing the hook after it has released itself from said ring. Fig. 2 is a front elevation of the same parts, omitting the boat. Fig. 3is a sideelevation of the link, swiveling stock, and hook,- showing the book as used when it is intended it shall more certainly look itself to the boat or other object suspended from it after such boat or other object has been deposited on the water or other place of deposit.

Similar letters refer to similar parts in the several figures.

a is an ordinary fall-block; I), a'link; o, a swiveling stock; d d, the overbalanced double hook, pivoted in the stock 0 at c, Fig. l. fis a ring, and g an eyeloolt, such as are usually found at either end of a ships boat, 71.

When the boat or other object to be lowered is-suspended from the heavier end, d, of the hook, the hook operates like any ordinary hook, and is neither self-releasing nor self-locking; but when the object to be lowered is suspended from the lighter end of the hook, and the heavier end of the hook is up againstthe stock with the point of the hook inward, all as shown in Fig. 1, the hook disengages itself by gravity as soon as its load finds support from below.

If the heavier end of the hook is up against the stock with the point of the hook outward,

as shown in Fig. 3, the effect of gravity is to more completely lock the opposite end of the hook to the boat orother attached object, whenever the boat or other attached object is waterborne or otherwise supported from below. i

I claim- -In davit and other fall-blocks, the combination, with the sustaining-loop and swiveling stock, of the overbalanced double hook d d, in one piece, constituting either a self-releasing or a self-locking hook, as required, substantially as set forth.

L. TAYLOR DIGKSON.

Witnesses! HARRY TALGE, JOHN A. WIEnnnsHEIM. 

